Fluid transporter and fluid transporter driving method

Abstract

A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor.

What is claimed is: 
     
       1. A fluid transporter comprising:
 a tube; 
 a rotational pressing plate including a body and a gear disposed below the body, the gear having a planar surface transverse to an axis of rotation of the rotational plate and the gear extending radially beyond a radially disposed peripheral surface of the body, the rotational pressing plate having a plurality of rotation reference positions disposed at equal angle intervals in the circumferential direction; 
 a plurality of pressing shafts disposed between the tube and the rotational pressing plate; 
 a driving rotor which gives a rotational force to the rotational pressing plate, the driving rotor having a plurality of other rotation reference positions disposed at equal angle intervals in the circumferential direction, a number of the other rotation reference positions being greater than a number of the rotation reference positions; 
 a reduction transmission mechanism which connects the driving rotor and the rotational pressing plate; 
 a first detecting section which determines a rotation angle of the rotational pressing plate based on detection of one or more of said plurality of rotation reference positions; 
 a second detecting section which determines another rotation angle of the driving rotor based on detection of one or more of said plurality of other rotation reference positions; and 
 a controller, wherein the controller controls an amount of a fluid delivered through the tube based on the detected rotation angle by the controller controlling a rotation of the rotational pressing plate to deliver a desired amount of the fluid; 
 wherein the first detecting section faces the planar surface of the gear of the rotational pressing plate and is adjacent to the rotational pressing plate. 
 
     
     
       2. The fluid transporter according to  claim 1 , which further includes a controller, detecting the rotation angle of the rotational pressing plate from a rotation reference position determined as a position where a detection timing obtained by the first detecting section and the detection timing obtained by a second detecting section agree with each other. 
     
     
       3. The fluid transporter according to  claim 1 , wherein
 the rotational pressing plate has n number of the projections disposed at equal angle intervals in the circumferential direction; and 
 the data table is prepared in the range from a position corresponding to one of the rotation reference positions to a position corresponding to 360/n degrees. 
 
     
     
       4. The fluid transporter according to  claim 1 , which further includes a data table, containing values of cumulative delivery amounts corrected based on the difference between a reference inside diameter and an actual inside diameter of the tube. 
     
     
       5. The fluid transporter according to  claim 1 , which further includes a drive control unit having the rotational pressing plate as one body, and a tube unit having the tube and the plural pressing shafts as one body, the drive control unit and the tube unit being attachable and detachable to and from each other. 
     
     
       6. A fluid transporter comprising:
 a tube; 
 a rotational pressing plate supported on a cam shaft, the rotational pressing plate having a plurality of rotation reference positions disposed at equal angle intervals in the circumferential direction; 
 a plurality of pressing shafts disposed between the tube and the rotational pressing plate; 
 a driving rotor which gives a rotational force to the rotational pressing plate, the driving rotor supported by a rotor shaft and having a plurality of other rotation reference positions disposed at equal angle intervals in the circumferential direction, a number of the other rotation reference positions being greater than a number of the rotation reference positions; 
 a first detecting section which determines a rotation angle of the rotational pressing plate based on detection of one or more of said plurality of rotation reference positions; 
 a second detecting section which determines another rotation angle of the driving rotor based on detection of one or more of said plurality of other rotation reference positions, wherein a detection plate included in the second detection section is disposed between the rotor shaft and a rotor pinion; 
 a first device frame supporting the cam shaft and the rotor shaft, the first device frame having a first interior surface; and 
 a controller, wherein the controller controls an amount of a fluid delivered through the tube based on the detected rotation angle of the rotational pressing plate and the rotation angle of the driving rotor by controlling a rotation of the rotational pressing plate such that the amount of the fluid corresponds to a desired delivery amount of the fluid; 
 wherein the first detecting section faces the planar surface of the rotational pressing plate and the second detecting section faces to the driving rotor, the first detecting section and the second detecting section being mounted to the first interior surface of the first device frame. 
 
     
     
       7. A fluid transporter comprising:
 a tube; 
 a rotational pressing plate including a planar surface transverse to an axis of rotation of the rotational plate, the rotational pressing plate having a plurality of rotation reference positions disposed at equal angle intervals in the circumferential direction; 
 a plurality of pressing shafts disposed between the tube and the rotational pressing plate; 
 a driving rotor which gives a rotational force to the rotational pressing plate, the driving rotor having a plurality of other rotation reference positions disposed at equal angle intervals in the circumferential direction, a number of the other rotation reference positions being greater than a number of the rotation reference positions; 
 a first detecting section which determines a rotation angle of the rotational pressing plate based on detection of one or more of said plurality of rotation reference positions; 
 a second detecting section which determines another rotation angle of the driving rotor based on detection of one or more of said plurality of other rotation reference positions; and 
 a controller, wherein the controller controls an amount of a fluid delivered through the tube based on the detected rotation angle by controlling a rotation of the rotational pressing plate such that the amount of the fluid corresponds to a desired delivery amount of the fluid, 
 wherein the first detecting section faces the planar surface of the rotational pressing plate and is adjacent to the rotational pressing plate.